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Finding the Fourth Proportional to 386,507.28, 579,755.52 and 133,971.60

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Solution

The fourth proportional to 386,507.28, 579,755.52 and 133,971.60 is: 200,955.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,507.28 : 579,755.52 = 133,971.60 : x
  2. Step 2: Convert to fraction form
    386,507.28/579,755.52 = 133,971.60/x
  3. Step 3: Cross multiply
    386,507.28x = 579,755.52 × 133,971.60
  4. Step 4: Simplify right side
    386,507.28x = 77,670,774,623.23
  5. Step 5: Solve for x
    x = 77,670,774,623.23/386,507.28
  6. Step 6: Final answer
    x = 200,955.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.